Glass is made of the mixture of______________
Rusting of Iron involves_______________
How long does the earth take to cover 1° longitude
Microphone converts sound energy into ___________
1 BTU(British thermal unit) is equal to___________
Dengue Fever is also called___________
Which element is used as moderator in nuclear reactor
Which of the following Rays are more Penetrating
Sun revolves around milky way in about _____ million years
Largest Galaxy in the Universe is_________